Accession Number : AD0749894

Title :   Utility of Tsai's Method for Seismic Discrimination.

Descriptive Note : Semi-Annual technical rept. no. 2, 1 Jan-30 Jun 72,

Corporate Author : TEXAS INSTRUMENTS INC DALLAS SERVICES GROUP

Personal Author(s) : Tsai,Yi-Ben

Report Date : 15 JUL 1972

Pagination or Media Count : 61

Abstract : The divergence of the M(s)-versus-m(b) data for earthquakes and underground nuclear explosions is shown to result primarily from the difference in source mechanisms and focal depths. It is demonstrated further that both the source dimension and the source time function are jointly resposible for causing the difference in source spectra for the two different types of seismic events. The source spectra of underground nuclear explosions are expressed in terms of the parameterized reduced displacement potential function. (Author)

Descriptors :   (*SEISMOLOGICAL STATIONS, NOISE), (*SEISMIC WAVES, IDENTIFICATION), (*UNDERGROUND EXPLOSIONS, DETECTION), EARTHQUAKES, NUCLEAR EXPLOSIONS, POWER SPECTRA, SPECTRUM SIGNATURES, RAYLEIGH WAVES

Subject Categories : Seismology
      Seismic Detection and Detectors

Distribution Statement : APPROVED FOR PUBLIC RELEASE